Electric-resistance alloy



UNITED STATES PATENT ormon WILLIAM A. SGHEUCH, OF NEW YORK, N. Y.,ASSIGNOR '10 WESTERN ELECTRIC COMPANY, INCORPORATED, OF NEW YORK, N. Y.,A CORPORATION OF NEW YORK. 7

ELECTRIC-RESISTANCE ALLOY.

1,337 ,27 6. Specification of Letters Patent.

No Drawing.

To all whom it may concern:

Be it known thatI, WILLlIAM A. Solution, a citizen of the United States,residing at New York, in the county of Bronx and State of New York, haveinvented certain new and useful Improvements in Electric-ResistanceAlloys, of which the following is a full, clear, concise, and exactdescription.

, This invention relates, to high resistance alloys, and its object isto provide an alloy having a highspecific resistance which possesses theproperties essential to a high resistance element, such as durabilityand a melting I point higher than that of {pure copper.

It is known that an alloy consisting of nickel and cobalt only, has aresistance somewhat greater than that of copper and that the specificresistance is quite appreciable for compositions, ranging as much asfrom 60 to 95% of nickel and 40 to 5% of cobalt. The highest specificresistance for the two elements, namely, about eight times that ofcopper, is obtained with a composition of approximately 80 to 85% ofnickel and 20 to 15% of cobalt.

However, in accordance with this invention,,it has been found that thespecific resistance of a. base alloy of nickel and cobalt may beenormously increased by the addi tion of the metal titanium. Thus, anaddition of 5% of titanium to the preferred base alloy of 80 to 85% ofnickel and 20 to "15%. of cobalt increases the resistance toapproximately forty times that of'copper; whilethe addition of 7.5% oftitanium increases the resistance to approximately fifty-six times thatof copper. The addltion of 20% of titanium,however, makes the alloy toobrittle to be readily worked and drawn at the present stage ,of thelmowledge of working metals. It is, therefore, desirable that thetitanium added should be less than 20%; and the preferred alloy isobtained by addwould'mean a mixture of approximately 75% nickel, 15%cobalt and 10% titanium.

Such an alloy, as cast, has the very high specific, resistance ofmorethan '50 times that of copper and i s-malleable and very' durable sothat it hasmany important uses Patented Apr. 20,1920.

Application filed August 3, 1917. Serial No. 184,229.

It has also been found that this alloy of nickel, cobalt and titaniummay have its working qualities considerably improved and may be morereadily melted by the ad- 'dition thereto of small amounts of themetals,

copper or manganese, or both. In general,

it will not be found necessary to add more than 10% of either of themetals, copper or manganese, or more than' a 20% mixture of the two.Thus, an alloy containing nickel, 14% cobalt, 8% titanium and 8% ofeither copper, manganese or a mixture of .both, has been ,found quitesatisfactory as a high resistance element." It is to be understood,however, that this invention is not limited to an alloy containingcopper and manganese, since these two metals may be omitted, if desired.

What is claimed is:

1. An alloy containing nickel, 1% r cent. cobalt or more and titanium,the mckel being in excess of 50%.

2. A resistance element containingnickel, 1% percent. cobalt or more andtitanium in substantial amounts. A resistance element comprising nickel,11} per cent. cobalt or more and titanium, the titanium content beingless than 20%.

4. A resistance element comprising nickel, 1% per cent. cobalt or moreand titanium, the titanium content being less than 12%.

5. A resistance element comprisingnickel, 1% per cent. cobalt or moreand titanium,

v the nickel being in excess of 50%. ing approximately 10% titanium to abase alloy of 83% nickel and 17%:cobalt, which ture.

7. A resistance element ,comprismg 60 to 85% of nickel, 30 to 10% ofcobalt, and

titanium in a substantial amount.

8. A resistance clement, approximately 11. A resistance elementcomprising nickel, 1% per cent. cobalt or more, titanium and copper. 7

12. A resistance element comprising nickel, 1:} percent. cobalt or more,titanium, and substantial amounts of manganese and copper.

resistance element comprising nickel, 1%

per cent. cobalt or more, titanium and manganese, the manganese contentbeing less than 20%.

14. A resistance element comprising nickel, 14; per cent. cobalt ormore, titanium,

- and one or more metals having the properties of copper and manganese,said one or more metals being present in an amount less than 20% 15. Aresistance element comprising ap nickel, 10 to 30% proximately 60 to 85%cobalt, and titanium and one or more metals having the properties ofmanganese and copper.

16. A resistance element comprising approximately -70 nickel, 14%cobalt, 8%

comprising titanium, and. 8% of one or more metals having the propertiesof copper and manganese.

17. A resistance element comprising ,ap-' proximately 70% nickel, 14%cobalt, 8% titanium, and 8% of manganese and copper.

18. An alloy comprising nickel, 1% per cent. cobalt or moreand titanium,said alloy being characterized by having a specific-resistance greaterthan an alloy of the first two named ingredients.

'19. An alloy comprising nickel, 1% per cent; cobalt or more, titaniumand manganese, the content of nickel being not less than 50% by weightof the whole, said alloy being characterized by having a specificresistance greater than an alloy of the first two named ingredients.

20. An alloy comprising nickel, 1.} cent. cobalt or more, titanium andcopper, the content of nickel being not less than 50% by. Weight of thewhole, said alloy being characterized by having a specific resistancegreater than an alloy of the first per two named ingredients.

21. An. alloy containing 60 'to 85% nickel, 10 to 3( cobalt, andtitanium and one or more metals having the properties of manganese andcopper.

In witness whereof I hereunto subscribe my7name this '2nd'day of August,A. D. 191

WILLIAM A. SCHEUCH.

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